Process of producing a ferrated and borated alkaline silicate.



UNITED stra'ras ra'rEnT orruoE.

THOMAS ROUSE, 0F STAMFORD LONDON, ENGLAllD, ASSIGNOB. OF ONE-HALF TO BESSLER WAECHTER COMPANY, LIMITED, OF LONDON, ENGLAND.

PROCESS or PRODUCING A rEnna'rEDANn BOItATED ALKALINE SILICATE.

1 ,1'09,'70;-1. No Drawing.

To all whom iti/wy cones-l w.

Be it known that I, THOMAS RousmBritish subject, residing at The Poplars, 6

feet Bank, Stamford Hill, London, N.,-

England, have invented the new and useful Improved Process of Producing a- Ferrated and Borated'Alkal'ine Silicate, of which the following is a specification.

As is well known,=-.alkaline silicates, such as silicate of potash and silicateof soda,

forming what is knownas isoluble water. glass, and mixtures of these alkaline-sili- I 'cates, have long been used as a binding agent in thezmanufacture of artificial stone for various uses; in the hriqueting of; powdered: fuel, ores, metalliferousbodies and the like production of paints, varnishes and in the and other odies. The alkaline silicate,

when in the form of a solution, is however I.

an unpleasantnsubstance to handle and owing to its bulk and-weight, expensive to transport; j If,',to avoid these objections it with an alkali'at a high temperature, it

- forms a hard glass like mass that can only be dissolved under pressures.

Now the object of the present'invention is a to produce a substance consisting mainly of alkaline silicatethat is suitable for various purposesv like .ordinary alkaline silicates but which, while possessing the advantages of such alkaline silicates, shall be in a solid state, can be easily powdered, shall not become deliquescent or sticky, can be readily dissolved in hot water without the aid of pressure and which-can be more economically used than ordinary alkaline silicates.

I have found that soluble silicious material'c'onsisting mainly of alkaline silicate and possessing all the above mentioned de' sirable advantages over ordinary alkaline silicates can be obtained by incorporating orcombining with an alkaline silicate, or mixture of alkaline silicates, of the kind herein referred to, or with thesubstances, such as silica and an alkali used for-making such an alkaline silicate, a small percentage of oxid of iron and a small percentage of calcined borax and heating the mixture tosuch a temperature and for such a time that the product will solidify on cooling, or, it may be, torender the product anhydrous. It is important that the porax should not be used Specification of Letters Patent, Patel! ted Sbt. 8, 1914. Application w February 9, 1911. Serial No. 607,580.

in the crystallized state, but in the dry amorphous condition produced by calcining crystallized borax. i

I In carrying out the invention, a soluble alkaline silicate according ;to the invention and which for distinction-I term ferrated and bonded alkaline silicate, is produced by heating a mass of alkaline silicious material and water with a small percentage of ferric oxid," say about one per cent. of ferric oXid (I -e 0 and a small percentage," say about one hsilflof one per cent., of calcinedborax, the ferric oxid and calcined. borax being thoroughly mixed or incorporated with the alkaline silicate and continuing the heating mass, on cooling, will solidify. The ferric oxid and calcined horax can be added to the alkaline silicious material and. water at any desired or convenient stage-of the process without .afiiecting the action that takes place v ,or the vproduct obtained. Thus, they. may be concentrated to.180 Twaddell, it form s a j sticky deliquescent stiff pasty mass- If the p v alkaline silicate be: producedby fusing silica befadded to a mixturerof the substances ordinarily used for making soluble alkaline silicate, :for example silica and caustic potash or caustic soda or their equivalents, or a mixture of these alkalies or their equiva' lent, containing water, beforeheatin these substances or they may be added, pre erably in the order mentioned, to and thoroughly incorporated with'the aqueous alkaline silicious mass while the same is being heated and is in a more or less liquid condition; or they inay'li'egaglded to and thoroughly incorporated with an aqueous solution of the alkaline silicate 'or silicates while the latter is in a cold or heated condition, the mixture of the alkaline silicate, water, ferric oxid and calcined-borax being in each case heated or boiled until .thewater present is evaporated to such a degree that the mass will The finished material solidify" on cooling. in each case'is of'a red color similar to that of coral. In each case the ferric oxid acts to facilitate the admixture and combination of the borax with the alkaline silicate. In each case there is obtained alkaline silicious material of a dry and non-deliquescent character, that contains a very high percentage of alkaline silicate, is capable of being readily reduced to powder, is of a red color, is in soluble in cold water, but readily soluble in hot water at ordinary atmospheric pressure.

and one part of which can be dissolved in about three times its weight of Water with' a and the evaporation of the .water until the p out separation of silicious or other matter, to form asolution that can readily and advantageously be used as a binding medium sticky; er :to'disintegrate by exposure to moist air, and containing only a very small amount of inorganic matter due to the silieious binding medium used. For briqueting small coal'and other finely divided materials that/are not 'of so porous a character as coke, a -smaller percentage of the said solution will sufiice. In. the production of the new 'matcrial accordiiig to this invention, the

heating may becarriedtosuch a degree that the product finally obtained is anhydrous. In this case'the product will be of a light porous or cellular character and of a pink color.

- "It is to be understood that the inventionis -not limited to the use. of the particular percentages of ferric. oxid and calcined borax ment oned byway of. example as givconsists in heating alkaline silicious material and Water with relatively small quantities of ferric oxid and calcined borax that are thoroughly incorporated therewith and continuing the heating of the mass until such time that the fer'ratedrand berated alkaline silicate obtained will solidify on cooling; 2. Asa new'article of manufacture-soluble alkaline silici'ous material, herein termed frrated and borated alkaline silicate, said material being'ofa= dry and non'deliquescent character and 1 capable ofbeing readily powdered, which ,contains' a very high percentage'of alkaline silicate and is insoluble in cold-wateh-but readily soluble in hot water-mt atmospheric pressure. In testimony whereof I have signed my name 'to" this specification in the presence of two subscribing witnesses.

THOS. Rouse.

Witnesses:

Bnn'rrn WI LLiAM MAUSER, ARTHUR FREDERICK GoL'rs. 

